274 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



portion and also tends to make the posterior portion less contracted 

 and of tlie character found in the Tenthredininse, and also shows how 

 it may have given rise to certain of the more elongate Blennocampini. 

 Examples of this may be found within the genera Xenapates and 

 Allantidea where the third anal vem is entirely without the basal con- 

 striction and where the second anal cell is of the type found in the 

 Tenthredininse, but is separated from the first anal cell by the oblique 

 cross vein. The following new genus adds another to the list which 

 shows many peculiarities. In this new genus the third anal vein is 

 almost entirely obliterated close to the margin of the wing just before 

 it unites with the second and third anal veins. This gives the anal 

 cell the appearance of Blennocampini with the exception that there 

 is produced backwards a short stump near where the tliird anal should 

 join the second anal. Why this curious condition should be found 

 only in orientarmembers of this group is not known. It is not in the 

 least unlikely that similar conditions will be found in other subfami- 

 lies; if so, these can be treated at some other time. Characteristic of 

 this subfamily is the shape of the head, more especially in the clyj^eal 

 region where the clypeus has the sides converging apically, the basal 

 portion of the clypeus being well between the inner margins of the 

 eyes, and not as in Blennocampini where the basal portion of the 

 clypeus is inserted lower down on the face, the apical margin extend- 

 ing to or beyond a line drawn tangent to the lowest portion of the 

 orbits; also in Blennocampini the clypeus is usually more nearly 

 parallel sided. 



ALLANTOPSIS, ne>Ar genus. 



Belongs to the subfamily Allantinae, to the tribe Allantini where 

 it is more closely related to AVantidea, but may be readily separated 



from this last-mentioned genus 

 by the nearly truncate clypeus 

 and narrower posterior orbits. 

 In some respects, namely, the 

 obliteration of the apical portion 

 of the third anal vein, it recalls 

 Blennocampini, but in all the 

 riG.i.-ANTERioEwiNGOFAi.LANTuPsisTHORAcicA ^^^^ charactcrs it is ffiorc 



closely allied to the Allantinae. 



Anterior margin of the clypeus, truncate or nearly so; inner margins 

 of the eyes converging to the cl3^eus; malar space wanting; posterior 

 orbits narrow, about half as long as cephal-caudad diameter of the 

 eye; lateral ocelli well below supraorbital line; antennal furrows pre- 

 sent; antennae short and stout, pedicellum much longer than apical 

 width, the third antennal joint much longer than the fourth; the 

 apical joints short, somewhat wider than the basal joints; thorax and 

 legs, as in Allantini; venation of the anterior wings, as in the accom- 

 panying figure; posterior wings like AUantus; claws, cleft. 



Type. — Allaniopsis thoracica Rohwer. 



